TY  - BOOK
AU  - Hilburn,John L.
AU  - Johnson,David E.
TI  - Manual of active filter design
SN  - 0070287694
U1  - TK/7872.F5 
PY  - 1983///
CY  - New York
PB  - McGraw-Hill
KW  - Electric filters, Active.
KW  - Electronic circuit design -- Graphic methods.
ER  -